Gauge



B. M w. HANSON GAUGE Filed March 27. 192E ofthe gauge, this gauging member, in

Patented Jan. 11., 1921. 1,613,824 UNITED STATES PATENTOFFICE.

HANSON, OF HARTFORD, CONNECTICUT; EINAR A. HANSON AND CLAR- I EXEC'UTORS OF SAID BENG'I. M. W. HANSON, DECEASED.

BEING! M. W.

ENCE E. .WEITNEY GA UGE.

Application filed March 27, 1925. Serial No. 18,886.

This invention relates to gauges. In the resent illustrative disclosure, the invention is shown as incorporated in a gauge for screw threaded members to which use it is peculiarly, applicable. It is to be understood that the present disclosure is by way of illustration only, as the. invention is susoeptible of other embodiments than that herein shown.

The aim of the present invention is to provide a gauge of the character described having various features of novelty and advanta e, and which is particularly characterize by the facility and quickness with which it may be employed to gauge threaded pieces and the like; by the accuracy with which the pieces may be gauged; by the precision and nicety with which the gan ing members ma be relatively. adjusted; by its durability and long life; and by its simplicity in construction.

Other objects will be in part obvious and in part pointed out more in detail hereinafter.

The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will "be indicated in the appended claims.

In the accompanying drawings:

Figure 1 is a side elevational view of my improved gauge;

Fig. 2 is a front view thereof with a portion of the frame broken away,

Fig. 3 is a sectional view taken substantially on line 3-3 of Fig. 1; and

Fig. *4 is a transverse section through the upper gauging member and shows the manner in which present instance, being in the ,form of a cylindrical jaw 15. The other jaw of the gauge is constituted of' two cylindrical jaw members 16 and 17 positioned within the sockets 14 and one behind the other. The jaw member 15 is arranged in opposed and staggered relation to the other two jaw members, that is to say, it is located out of the lane of the active gauging surfaces of the aw members 16 and TE and with its axis at substantially like distances from the axes of the members 16 and 17. The three jaw members are arranged so that their axes, when viewed from one end of the gauge, form the apices of an isosceles triangle. In the present illustrative disclosure the round jaw members are respectively provided with screw threads 15, 16', and 17 each of which is subst antiallysimilar in all respectsto the thread desired on the piece to be gauged, but running in the opposite direction thereto.

In order to permit gauging of the work or piece to be measured without turning or rotating that piece to accommodate the lead of the thread thereon, oneof the gauging members is mounted for endwise or longitudinal movement, in the present instance the jaw member 15 being so mounted. In the drawings the member 15 is illustrated as being slidably supported by a stud 20 secured in lace on the frame by The memher is held against. withdrawal" from the stud by a stop screw 22 or other suitable means. In the present illustrat ve disclosure, the jaw 15 is keyed for sliding movement, the roll having a longitudinally extending key-way 23 into which extends a key 24 mounted in the stud 20.

I have found that if the key 24 were rigid and fitted closely within the key-way, the gauging member 15, when the piece to be gauged is brought into engagement therewith may have a tendency to bind aga nst the stud and not slide freely and, articularly is this the case, where the operator brings the piece to be gauged into engagement with the gauging member with the and member out of paralthis gauging member is resiliently keyed to its support or bearing,'this' view being taken on line 4-4 of Fig. 3.

Referring to the drawings in detail, 10 is a frame of any suitable construction, it being here shown, for illustrative purposes, as being in the form of a C having, at one end, a guard 11 provided with a parti-cylindrical socket 12,,and at its other end with a guard 13 having apair of parti-cylindrical sockets 14 in opposed relation to the socket 12. Located in one end of the frame, in the present instance within the socket '12, is a gauging" member which constitutes one alilv t e the arrangement is such as to allow of a slight helical movement oithe member 15 direction when the piece to be gauged is.

brought into contact therewith. In other words, if the piece to be tested is moved into engagement with the'jaw 15, the aw will have a slight helical movement and then, when the piece is moved from engagement with the jaw, the springkey will. move the latter to the position shown in Fig. 3 and from which position the roll may be again moved in either direction when the same or another piece of work is brought into engagement therewith.

proper pitch relative to one another.

For the purpose of adapting the gauge for use in gaugin threaded members of various specified wor ing allowances or, tolerances, novel and advantageous means are provided foradjusting each of the jaw members '16 i and 17 relative to-the opposed jaw or gauging member 15, and these means are such that the adjustments may be made with great nicely and accuracy, and the gauging members 16 and '17 (which are" normally fixed against turning movement) may, when desired, be turned about-their own axes to disturbing the adjustments. The cylindrical jaw members 16 and 17 are -similarly mounted and a description of one is illustrative of both. Closely fitting within an opening 30 in the frame and, preferably, of less length than that opening, is an eccentric bushing 31. The bushing may be adjusted as by means of a tool inserted into a kerf 32 rovided in the outer end of the bushing. 'ccentrically mounted within the bushin is a stud or shaft 33 on which the jaw mem r 16 has a relatively close fit. The ,stud 33 has a head 34 engaging against an internal shoulder 35 on the member 16, and the parts are clamped together by a nut 36 which is screwed up against a washer 37 engaging the frame about the outer end of the hole 30. The bushing 31 maybe secured, if desired, in adjusted position by a set screw 38.

Assuming, for purposes of illustration, that the gauge is particularly constructed for measuring threaded member 1" in demeter, and the specified limits of accgi acy The extent of helical. movement of the jaw 15 is, of course, notsuflicient to throw the jaw members out of.

diameters of the pieces .thread may also be determined. bring into play new gauging areas without bushings 31 by .36. turning the gauging members a sli ht extent about-the studs 33 and then clamplng for the particular threaded member to be gauged are 1- and 1" minus .002, the procedure is as follows: The 'nut 36 and the .washer'37 are removed and the screvt 38 is loosened, and then the eccentric bushing 31 The rearmost gauging member 17 will then be adjusted in a similar manner to a position where a threaded test piece having a diameter of exactly .998. will just pass between the 1 auging members 15- and 17. The threa ed member to be gauged is now moved with its axis substantially parallel to the axesof the gauging members between the gauging members 15 and 16, and when brought into engagement with the member 15, the same will be given a helical move-- ment whereby the lead of the thread being gauged is accommodated. If the piece passes between the gauge members 15 and 16, which constitute a go gauge, but will not pass between the members 15 and 17, which constitute a no go gauge, the piece is acceptable as being within the selected limits of tolerances.

From'the foregoing description, taken in connection with th ings, it will be seen that pieces of work may be quickly and accurately testedwith great facility, it being possible to measure the pieces within go and no go limits by passing each piece but once into the gauge. It will also be seen that not onlymay the be tested, but the and shape of the Owing to the sliding movement of the jaw accuracy of the pitch screwing the latter between the gauging members and, owing to the spring connection or key 24, when a piece of workis brought into engagement with the member 15, binding or cramping, together with the resultant damage to the gauging members, 1S guarded against. Each of the jaws" 16 and 17 may be very quickly adjusted with great nicety relative to the opposing. jaw 15 by adjusting the eccentrics 31. The gaugmg members 16 and 17 will have a relatively long hfe owingto the fact that, when they become worn along any line, these members may be adjusted about their own axes as new gauging surfaces.

j This may be done without changing the adjustment of ,v the merely loosening the nuts the partsby screwing homethe nuts 36. It

will be further observed that the gauge is position by e accompanying draw- 5, the PIECES may be tested without rotating or.

very simple in construction, comprises but a relatively few number of parts, and may be economically manufactured and the gauging members are protected against injury by the guards 11 and 13.

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from he scope thereof, matter contained in the above description or shown in the accompanyi shall be interpreted as illustrative and not in .a limiting sense; 1 It is also to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the invention herein described and all statementsof the scope of the nvention which, as a matter of language,

might be said to fall therebetween.

' stud and jaw member means for securing said bushing 1n adjusted I claim as my invention: 1

1. In a gauge of the character described, a frame having opposed gaugingmembers, one of which comprises a round jaw member provided with a gauging thread. a bearing concentrically supporting said jaw eccentrically suamember, and a bushing porting saidl bearing and mounted for a justment in said frame.

2. In a gauge of the character described, a frame having opposed gauging members. one of which comprises a cylindrical jaw member, an eccentric bushing, a stud eccentrically mounted in said bushing, said jaw member being concentrically mounted on said stud for adjustment about its own axis, said bushing being mounted in said frame for adjustment to move said jaw member relative to an opposed means for securing said stud and jaw member against rotation. v

3'. In a gauge of the character described, a frame having opposed gauging members, one of which comprises an externally threaded cylindrical jaw member, bushing mounted for adjustment in, said frame. a stud eccentrically mounted in said bushinggsaid jaw member being concentrically mounted on said'stud for adjustment about-its own axis, means for securing said a ainst rotation, and

position.

4. In a gauge of the character described, a frame having an opening, opposed gauging members mounted in said frame, one of which comprises an externally threaded cylindrical jaw -member, a bushing mounted for adjustment in said opening and terminating short of each end thereof,'a stud eccen trically mounted in said bushing, said aw member being concentrically mounted on one end of said stud and engaging at one end against one side of said frame, said it is intended that all g drawing when a piece of work -a frame having opposed one of which comprises said member and 'bearing gauging member, and.

comprises a cylindrical j aneccentric H one of which comprises a 'and on its perip and a bearing supporting said jaw member,

and means whereby said member has a helical movement on said bearing.

6. In a gauge of the character described, a frame having opposed gauging members, one of which comprises a cylindrical jaw member provided with a gau 'ng thread, a bearing for said member, and aconnection between said bearing and member permitting of a helical movement of said member in either direction.

7. In a gauge of the character described, a frame having opposed gauging members, one of which comprises a c lindrical jaw member havinga'gauging t read, a bearing for said member, said member being mounted for a slight limited helical move ment, and means for normally urging .said member to, and holding the same in, a position from which it may be helically moved is brought into engagement therewith. v

8. In a gauge of the character described, gauging members, a cylindrical jaw member having a gauging thread, a bearing for said member, and a connection between for permitting of a limited helical movement of the former, said connection normally holding said member in a position between the limits of its helical movements.

9. In a gauge of the character described, opposed gauging membe s, one of which w member having a gauging thread, a support for said member, and a resilient key between said membet and support. b 10. In a gauge of the character described, a frame having opposed gauging, members, cylindrical jaw internal key-way a gauging thread, her and having member provided with an hery with a stud supporting said mem a transverse opening, and a key havin' its,

opposite ends" fitting respectively in said eyway and opening, said key, between its ends, being resilient. 1

11. In a gauge of the character described, a frame, three cylindrical jaw members mounted thereon and each having a gauging.

thread on its periphery, said members being arranged with their axes when viewed from one end of the gauge at the apices of an isoscelestriangle, one of said members being mounted for longitudinal sliding movement.

12. In a gauge of the character described, a frame, three cylindrical jaw members mounted thereon and each having a gauging thread on its periphery, two of said members being arranged one behind the other and the thirdof said members being in staggered and opposed relation to the first two, means whereby said third member has a limited helical movement, and each of said first two members being supported for adjustment relative to said third one and each being adjustable about its own axis.

13. In a gauge of the character described, a frame, three cylindrical jaw members -mounted thereon and each having a gauging thread on its periphery, 'two of said members bein arranged one behind the other and the third of said members being in staggered and opposed relation to the first two a stud supporting said third member, and means comprising a resilient key and permitting of a small limited helical movement of said third member.

14. In a gauge of the character described, a C frame having at one end a guard forming a pair of parti-cylindrical sockets one behind the other, said frame having at its other end a guard forming a parti-cylindrical socket in opposed and staggered relation to said first mentioned sockets, and a cylindrical jaw member located in each socket, each of said members having'a gauging thread. BENGT M. W. HANSOl 

